Spark-arrester



(mmodel') J. B. BARNES.

SPARK ARRESTER- No. 403,984. Patented May 28, 1889.

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UNITED ST TES PATENT OFFICE.

JOSHUA B. BARNES, OF SPRINGFIELD, ILLINOIS.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 403,984, dated May 28, 1889.

Application filed February 4, 1889. Serial No. 298,647. (No model.)

To all whom it may concern.-

Be it known that I, JOSHUA B. BARNES, of Springfield, in the county of Sangamon and State of Illinois, have invented a new and Improved Spark-Arrester; and I do hereby de' clare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in spark-arresters for locomotive and other boilers.

The prime object of my device is to arrest the sparks and cinders as they issue from the fiues and project-them by the action of the draft into a receptacle of large capacity, so constructed and located in the smoke-box that however full it may be its contents will be protected against disturbance by direct or reactionary currents of air induced by the draft.

A further object of my device is to provide means for strengthening the draft in the lower part of the smoke-box and to check its force near the exhaust-nozzles, where it would have a tendency to draw the sparks through the screen.

In addition to the above, a still further object of my device is to improve the effectiveness of what is commonly termed the petticoat or lifting pipe, which is simply a short conical tube supported above the exhaust-nozzles, so as to form a draft-concentrator.

With these ends in view my invention consists, essentially, of a novel combination and disposition of curved deflectors and screen, one of the deflectors being so located as to divide the smoke-box into two compartments, one of thelatter serving as a receptacle for cinders and sparks, the other filling the office of an auxiliary draft-concentrator, in which the cinders and sparks are lifted and impelled by the draft with such initial velocity that their own momentum will project them beyond the reach of the draft against curved deflectors, by which they are thence directed into the ash-bin.

My invention further consists in the em ployment of a curved imperforated deflector interposed between the partition which separates the ash-bin from the rear of the smoke box and the inclined screen, so as to intercept the sparks that rebound from the partition toward the upper part of the screen.

My invention still further consists in giving to the lifting or petticoat pipe such basal form that its effectiveness is more advantageously distributed over the screen than heretofore.

The details by which I accomplish these ends are more fully explained in the following specification and illustrated in the accompanying drawings, in which- Figure 1 is a side sectional View of the flue end of the boiler and smoke-box, taken in the line of their axes, but showing the eX haust-pipcs and the petticoat-pipe in full. Fig. 2 is a front end View of the smoke-box, taken in the line 00 at, showing the interior arrangement of deflectors and screen.

Referring to the drawings, A represents the smoke-box; 7c, the smoke-stack; B, the flue end of the boiler, and C a baffling-plate of the ordinary form, secured to the upper part of the flue-plate. To the lower edge, a, of said baffling-plate is secured the lower edge of a screen, S, inclined upward and forward, and having its upper edge secured to the lower edge of an inclined imperforated curved deflector, D, fitting and secured to the upper internal part of the smoke-box, alittle forward of the smoke-stack. Said screen may be a perforated steel plate or a wirenetting, but in either case so located and connected with the deflector D that the latter will constitute an imperforated continuation of the screen, adapted to fill the office of a deflector, the screen being made to closely fit the sides of the smoke-box, to which it is secured by angle-irons and rivets or other suitable means.

Through an aperture in the central part of the screen project vertically the nozzles of the exhaust-pipes I, above which is suspended a petticoat-pipe, J, the lower part of which is sloped, as shown in the drawings, so as to coincide with the inclination of the screen, a lit tle above which it is located.

cally through its central part, the combination,with said screen, of a etticoat-pipe having its base sloped so as to coincide with the inclination of the screen and located slightly 5 above it, substantially as shown, and for the purpose herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 17th day of January, A. D. 1889.

JOSHUA B. BARNES.

WVitnesses:

.C. F. LAPE,

S. W. JEFFERY. 

